HGH Sprays are very expensive. Why?

Why is it that HGH sprays are so expensive? Does price set it as the best hgh product to buy, or is it the description? How do you really know what your getting when you buy one of these $80.00 a bottle sprays? You really don’t know. If they do contain a good amount of HGH then some of the robust claims would be true, however this being a powerful and expensive substance that you have to get with a prescription makes this a highly implausible probability. I’m not sure why they could sell HGH over the counter when its a controlled substance but it really makes you wonder just what your getting for that 80.00!